Finding the Fourth Proportional to 78,195.50, 107,909.98 and 42,385.35

Step by Step Solution

1. Step 1: Write the proportion equation
   78,195.50 : 107,909.98 = 42,385.35 : x
2. Step 2: Convert to fraction form
   78,195.50/107,909.98 = 42,385.35/x
3. Step 3: Cross multiply
   78,195.50x = 107,909.98 × 42,385.35
4. Step 4: Simplify right side
   78,195.50x = 4,573,802,270.79
5. Step 5: Solve for x
   x = 4,573,802,270.79/78,195.50
6. Step 6: Final answer
   x = 58,491.89